Voluntary exercise and caloric restriction enhance hippocampal dendritic spine density and BDNF levels in diabetic mice.

Voluntary exercise and caloric restriction enhance hippocampal dendritic spine density and BDNF levels in diabetic mice.
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DOI:
10.1002/hipo.20577
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发表时间:
2009-10
期刊:
影响因子:
3.5
通讯作者:
Mattson, Mark P.
Mattson, Mark P.
中科院分区:
医学3区
文献类型:
--
作者:
Stranahan, Alexis M.;Lee, Kim;Martin, Bronwen;Maudsley, Stuart;Golden, Erin;Cutler, Roy G.;Mattson, Mark P.

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糖尿病可能会对认知功能产生不利影响,但其潜在机制尚不清楚。为了研究提高神经营养蛋白水平的操作是否也能恢复糖尿病的神经元结构和功能,我们研究了轮跑和饮食能量限制对 db/db 小鼠(胰岛素抵抗糖尿病模型)海马神经元形态和 BDNF 水平的影响。跑轮活动、热量限制或两种治疗的组合增加了 db/db 小鼠海马体中 BDNF 的水平。海马 BDNF 的增强伴随着齿状颗粒神经元的二级和三级树突上的树突棘密度的增加。这些研究表明,糖尿病对海马结构产生有害影响,并且可以通过增加能量消耗和减少能量摄入来减弱这种状态。
Diabetes may adversely affect cognitive function, but the underlying mechanisms are unknown. To investigate whether manipulations that enhance neurotrophin levels will also restore neuronal structure and function in diabetes, we examined the effects of wheel running and dietary energy restriction on hippocampal neuron morphology and BDNF levels in db/db mice, a model of insulin resistant diabetes. Running wheel activity, caloric restriction, or the combination of the two treatments increased levels of BDNF in the hippocampus of db/db mice. Enhancement of hippocampal BDNF was accompanied by increases in dendritic spine density on the secondary and tertiary dendrites of dentate granule neurons. These studies suggest that diabetes exerts detrimental effects on hippocampal structure, and that this state can be attenuated by increasing energy expenditure and decreasing energy intake.
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